[3.13] gh-120360: Add self as IDLE doc owner (GH-120571) (#120576)

gh-120360: Add self as IDLE doc owner (GH-120571)

Add self as IDLE doc owner
(cherry picked from commit cf49ef7)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Author: miss-islington

.github/CODEOWNERS

@@ -205,6 +205,7 @@ Doc/c-api/stable.rst          @encukou
 **/*ensurepip*                @pfmoore @pradyunsg
 
 **/*idlelib*                  @terryjreedy
+/Doc/library/idle.rst         @terryjreedy
 
 **/*typing*                   @JelleZijlstra @AlexWaygood